Old thread, but this comes up when searching for hiding the status bar in calibre, so I thought I'd post here.
I don't want to restart a discussion on the importance of the status bar, but in case there's a user that wants to ignore all the good things in the status bar and hide it anyway, I've made a plugin that does just that (and allows you to toggle the status bar on and off).
https://github.com/bkanuka/calibre-p...hide-statusbar